/* ===================

AX2E (AXESCON XACML 2.0 Engine) is the Java authorization engine, which implements OASIS XACML 2.0 standard.
Copyright (C) 2007 AXESCON LLC

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA


Contact: AXESCON LLC - info{at}axescon.com

 =================== */
package axescon.xacml.model.shared.attr;


/**
 * @author Date: Oct 1, 2005
 *         Responsibilities:
 */
public interface ArithmeticValue {
    ArithmeticValue subtract(ArithmeticValue arg);

    ArithmeticValue multiply(ArithmeticValue arg);

    ArithmeticValue divide(ArithmeticValue arg);

    ArithmeticValue mod(ArithmeticValue arg);

    ArithmeticValue add(ArithmeticValue arg);

    /**
     * sums up an array of numbers
     *
     * @param arg
     * @return sum of numbers in the array
     */
    ArithmeticValue sum(ArithmeticValue[] arg);

    /**
     * Creates a value of zero.
     * @return zero
     */
    ArithmeticValue getZero();
}
